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christopher (12.91.11.78)

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Posted on Wednesday, May 29, 2002 - 9:30 pm:   

i want to locate a switch for the block and water heater on my dash. do i have to run the 12/2 all the way up the dash and back to power or can i just run the white ntr wire ? if i have to do a relay setup, does anone have a schmatic and will the cole herse magnetic latching solenoid work?
they cost 25.00 each.
thanx
christopher 5c
Mike T (206.170.33.159)

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Posted on Wednesday, May 29, 2002 - 10:18 pm:   

Christopher, One advantage to the relay idea is that you can have a switch on your dash that is more fitting with or even match the look of the other switches on the dash. A 12vdc or 24vdc relay at your panel operated by the dash switch would do it. I don't think it needs to be a latching relay. I'm not an expert but I'm doing a bunch of stuff like that on mine (right or wrong).
califbob (209.162.29.247)

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Posted on Wednesday, May 29, 2002 - 11:18 pm:   

Hey I'm no expert either but I picked up power in the rear and just ran a switched ground to the front. Like Mike said right or wrong it works and saves a whole lot of wireing.
David Anderson (168.215.176.128)

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Posted on Wednesday, May 29, 2002 - 11:46 pm:   

Use an AC relay rated to carry the amps of the appliance, one that has a dc coil. Put it near the appliance in an appropriate enclosure and run 12v hot (probably #16) to the dash and use a dc switch. Fuse the coil circuit. 5amps should suffice. The relay coil only draws milliamps. I think those relays are about $15 to $20 from Grainger.
Jayjay (65.134.221.99)

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Posted on Thursday, May 30, 2002 - 1:39 am:   

David's got the hot setup. Switching the neutral is unsafe, and illegal. ( illegal in this instance means that when your coach burns down, or someone gets electrocuted, then the Insurance Company doesn't have to pay off, and you may face a wrongful death suit.) If you don't understand his instructions, you should hire a competent,electrician locally to advise you. Cheers...JJ
chris (12.91.18.118)

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Posted on Thursday, May 30, 2002 - 8:15 am:   

everyone thanx
which wire goes on the relay? i assume the black
thanx
chris
Ted Calvert (Chowbus) (192.132.225.130)

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Posted on Thursday, May 30, 2002 - 10:55 am:   

As a long-time electrician, I second what JJ and David have said. Do not ever switch the "grounded conductor" (aka "Nuetral", not to be confused with "grounding conductor", aka "ground").
Besides which, would you really want 110 volt under your dash?

Be safe.

Ted.
Richard Bowyer (Drivingmisslazy) (66.190.119.82)

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Posted on Thursday, May 30, 2002 - 6:09 pm:   

How do you get a three way light switch to work if you do not switch neutral?
Richard
Jack Conrad (Jackconrad) (204.193.117.66)

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Posted on Thursday, May 30, 2002 - 7:11 pm:   

Using 2 3-way switches, connect the Power In (Black) to the common terminal on one of the switches. The common terminal on the other switch connects to the light, heater, outlet, etc. The other 2 terminals on each switch are then connected together (I used red and yellow, just to keep everything straight). The neutrals and grounds are connected directly together, not connected through the switches. I hope I have explained this correctly. Jack
Scott Whitney (24.205.236.239)

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Posted on Sunday, June 02, 2002 - 1:30 am:   

There is a little green book you can get at Home Depot in the electrical section that explains all the basic household wiring techniques. Called 'Simplified Wiring' or something like that. Good reference to have on hand, though I have noticed a couple minor mistakes in some of the drawings.

Scott

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